Question

помогите пожалуйста!!!
умоляю вас очень срочно!!

Answer 1

Ответ:

1. 18t/63y

2.-6

Объяснение:

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Answer 2

Объяснение:

2t/ 7y = (9 * 2t)/(9 * 7y) = 18t/63y

6d/(d² - b²) + 6/(b - d) =

6d/( (d-b)(d+b) ) + 6/(b - d) =

6d/( -(b-d)(d+b) ) + 6/(b - d) =

- (6d)/( (b-d)(d+b) ) + 6/(b - d) =

( -6d + 6(d+b) )/( (b-d)(d+b) ) =

(-6d + 6d + 6b)/b² - d² = 6b/(b² - d²)

d = -3; b = -2

6b/(b² - d²) = (6*(-2))/( (-2)² - (-3)² ) =

(-12)/(4 - 9) = (-12)/(-5) = 12/5 = 2. 2/5